// 【判断】进度100%  也就是 【num>=100】则【1-移除DOM】【2-清除定时器】
var num = 0 
var over = false 
var t = setInterval(function (){
    var nprogress= document.createElement('.nprogress')
    if (num >=95 && !over) return 
    num++
if (nprogress){
    nprogress.style.width = num + '%'
}else {
    var nprogress =document.createElement('div')
    nprogress.className = 'nprogress'
    nprogress.style.position = 'fixed'
    nprogress.style.top = 0
    nprogress.style.width = num +'%'
    nprogress.style.height = '5px'
    nprogress.style.background = '#29d'
    document.body.appendChild(nprogress)


    //优化2
    var nprogressRadius = document.createElement('div')
    nprogressRadius.className = 'nprogressRadius'
    document.body.appendChild(nprogressRadius)
}


if (num >=105){
    document.body.removeChild(nprogress)
    clearInterval(t)
    document.body.removeChild(document.querySelector('.nprogressRadius'))
}
    
},10)

window.addEventListener('load',function (){
    over = true
})